src/test/ui/issues/issue-18959.stderr

   1 error[E0038]: the trait `Bar` cannot be made into an object
   2   --> $DIR/issue-18959.rs:11:1
   3    |
   4 LL | fn foo(b: &dyn Bar) {
   5    | ^^^^^^^^^^^^^^^^^^^ the trait `Bar` cannot be made into an object
   6    |
   7    = note: method `foo` has generic type parameters
   8
   9 error: aborting due to previous error
  10
  11 For more information about this error, try `rustc --explain E0038`.